1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2020 BayLibre, SAS
4 * Author: Phong LE <ple@baylibre.com>
5 * Copyright (C) 2018-2019, Artem Mygaiev
6 * Copyright (C) 2017, Fresco Logic, Incorporated.
7 *
8 */
9
10 #include <linux/media-bus-format.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/interrupt.h>
14 #include <linux/i2c.h>
15 #include <linux/bitfield.h>
16 #include <linux/property.h>
17 #include <linux/regmap.h>
18 #include <linux/of_graph.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/pinctrl/consumer.h>
21 #include <linux/regulator/consumer.h>
22
23 #include <drm/drm_atomic_helper.h>
24 #include <drm/drm_bridge.h>
25 #include <drm/drm_edid.h>
26 #include <drm/drm_modes.h>
27 #include <drm/drm_print.h>
28 #include <drm/drm_probe_helper.h>
29
30 #include <sound/hdmi-codec.h>
31
32 #define IT66121_VENDOR_ID0_REG 0x00
33 #define IT66121_VENDOR_ID1_REG 0x01
34 #define IT66121_DEVICE_ID0_REG 0x02
35 #define IT66121_DEVICE_ID1_REG 0x03
36
37 #define IT66121_REVISION_MASK GENMASK(7, 4)
38 #define IT66121_DEVICE_ID1_MASK GENMASK(3, 0)
39
40 #define IT66121_MASTER_SEL_REG 0x10
41 #define IT66121_MASTER_SEL_HOST BIT(0)
42
43 #define IT66121_AFE_DRV_REG 0x61
44 #define IT66121_AFE_DRV_RST BIT(4)
45 #define IT66121_AFE_DRV_PWD BIT(5)
46
47 #define IT66121_INPUT_MODE_REG 0x70
48 #define IT66121_INPUT_MODE_RGB (0 << 6)
49 #define IT66121_INPUT_MODE_YUV422 BIT(6)
50 #define IT66121_INPUT_MODE_YUV444 (2 << 6)
51 #define IT66121_INPUT_MODE_CCIR656 BIT(4)
52 #define IT66121_INPUT_MODE_SYNCEMB BIT(3)
53 #define IT66121_INPUT_MODE_DDR BIT(2)
54
55 #define IT66121_INPUT_CSC_REG 0x72
56 #define IT66121_INPUT_CSC_ENDITHER BIT(7)
57 #define IT66121_INPUT_CSC_ENUDFILTER BIT(6)
58 #define IT66121_INPUT_CSC_DNFREE_GO BIT(5)
59 #define IT66121_INPUT_CSC_RGB_TO_YUV 0x02
60 #define IT66121_INPUT_CSC_YUV_TO_RGB 0x03
61 #define IT66121_INPUT_CSC_NO_CONV 0x00
62
63 #define IT66121_AFE_XP_REG 0x62
64 #define IT66121_AFE_XP_GAINBIT BIT(7)
65 #define IT66121_AFE_XP_PWDPLL BIT(6)
66 #define IT66121_AFE_XP_ENI BIT(5)
67 #define IT66121_AFE_XP_ENO BIT(4)
68 #define IT66121_AFE_XP_RESETB BIT(3)
69 #define IT66121_AFE_XP_PWDI BIT(2)
70 #define IT6610_AFE_XP_BYPASS BIT(0)
71
72 #define IT66121_AFE_IP_REG 0x64
73 #define IT66121_AFE_IP_GAINBIT BIT(7)
74 #define IT66121_AFE_IP_PWDPLL BIT(6)
75 #define IT66121_AFE_IP_CKSEL_05 (0 << 4)
76 #define IT66121_AFE_IP_CKSEL_1 BIT(4)
77 #define IT66121_AFE_IP_CKSEL_2 (2 << 4)
78 #define IT66121_AFE_IP_CKSEL_2OR4 (3 << 4)
79 #define IT66121_AFE_IP_ER0 BIT(3)
80 #define IT66121_AFE_IP_RESETB BIT(2)
81 #define IT66121_AFE_IP_ENC BIT(1)
82 #define IT66121_AFE_IP_EC1 BIT(0)
83
84 #define IT66121_AFE_XP_EC1_REG 0x68
85 #define IT66121_AFE_XP_EC1_LOWCLK BIT(4)
86
87 #define IT66121_SW_RST_REG 0x04
88 #define IT66121_SW_RST_REF BIT(5)
89 #define IT66121_SW_RST_AREF BIT(4)
90 #define IT66121_SW_RST_VID BIT(3)
91 #define IT66121_SW_RST_AUD BIT(2)
92 #define IT66121_SW_RST_HDCP BIT(0)
93
94 #define IT66121_DDC_COMMAND_REG 0x15
95 #define IT66121_DDC_COMMAND_BURST_READ 0x0
96 #define IT66121_DDC_COMMAND_EDID_READ 0x3
97 #define IT66121_DDC_COMMAND_FIFO_CLR 0x9
98 #define IT66121_DDC_COMMAND_SCL_PULSE 0xA
99 #define IT66121_DDC_COMMAND_ABORT 0xF
100
101 #define IT66121_HDCP_REG 0x20
102 #define IT66121_HDCP_CPDESIRED BIT(0)
103 #define IT66121_HDCP_EN1P1FEAT BIT(1)
104
105 #define IT66121_INT_STATUS1_REG 0x06
106 #define IT66121_INT_STATUS1_AUD_OVF BIT(7)
107 #define IT66121_INT_STATUS1_DDC_NOACK BIT(5)
108 #define IT66121_INT_STATUS1_DDC_FIFOERR BIT(4)
109 #define IT66121_INT_STATUS1_DDC_BUSHANG BIT(2)
110 #define IT66121_INT_STATUS1_RX_SENS_STATUS BIT(1)
111 #define IT66121_INT_STATUS1_HPD_STATUS BIT(0)
112
113 #define IT66121_DDC_HEADER_REG 0x11
114 #define IT66121_DDC_HEADER_HDCP 0x74
115 #define IT66121_DDC_HEADER_EDID 0xA0
116
117 #define IT66121_DDC_OFFSET_REG 0x12
118 #define IT66121_DDC_BYTE_REG 0x13
119 #define IT66121_DDC_SEGMENT_REG 0x14
120 #define IT66121_DDC_RD_FIFO_REG 0x17
121
122 #define IT66121_CLK_BANK_REG 0x0F
123 #define IT66121_CLK_BANK_PWROFF_RCLK BIT(6)
124 #define IT66121_CLK_BANK_PWROFF_ACLK BIT(5)
125 #define IT66121_CLK_BANK_PWROFF_TXCLK BIT(4)
126 #define IT66121_CLK_BANK_PWROFF_CRCLK BIT(3)
127 #define IT66121_CLK_BANK_0 0
128 #define IT66121_CLK_BANK_1 1
129
130 #define IT66121_INT_REG 0x05
131 #define IT66121_INT_ACTIVE_HIGH BIT(7)
132 #define IT66121_INT_OPEN_DRAIN BIT(6)
133 #define IT66121_INT_TX_CLK_OFF BIT(0)
134
135 #define IT66121_INT_MASK1_REG 0x09
136 #define IT66121_INT_MASK1_AUD_OVF BIT(7)
137 #define IT66121_INT_MASK1_DDC_NOACK BIT(5)
138 #define IT66121_INT_MASK1_DDC_FIFOERR BIT(4)
139 #define IT66121_INT_MASK1_DDC_BUSHANG BIT(2)
140 #define IT66121_INT_MASK1_RX_SENS BIT(1)
141 #define IT66121_INT_MASK1_HPD BIT(0)
142
143 #define IT66121_INT_CLR1_REG 0x0C
144 #define IT66121_INT_CLR1_PKTACP BIT(7)
145 #define IT66121_INT_CLR1_PKTNULL BIT(6)
146 #define IT66121_INT_CLR1_PKTGEN BIT(5)
147 #define IT66121_INT_CLR1_KSVLISTCHK BIT(4)
148 #define IT66121_INT_CLR1_AUTHDONE BIT(3)
149 #define IT66121_INT_CLR1_AUTHFAIL BIT(2)
150 #define IT66121_INT_CLR1_RX_SENS BIT(1)
151 #define IT66121_INT_CLR1_HPD BIT(0)
152
153 #define IT66121_AV_MUTE_REG 0xC1
154 #define IT66121_AV_MUTE_ON BIT(0)
155 #define IT66121_AV_MUTE_BLUESCR BIT(1)
156
157 #define IT66121_PKT_CTS_CTRL_REG 0xC5
158 #define IT66121_PKT_CTS_CTRL_SEL BIT(1)
159
160 #define IT66121_PKT_GEN_CTRL_REG 0xC6
161 #define IT66121_PKT_GEN_CTRL_ON BIT(0)
162 #define IT66121_PKT_GEN_CTRL_RPT BIT(1)
163
164 #define IT66121_AVIINFO_DB1_REG 0x158
165 #define IT66121_AVIINFO_DB2_REG 0x159
166 #define IT66121_AVIINFO_DB3_REG 0x15A
167 #define IT66121_AVIINFO_DB4_REG 0x15B
168 #define IT66121_AVIINFO_DB5_REG 0x15C
169 #define IT66121_AVIINFO_CSUM_REG 0x15D
170 #define IT66121_AVIINFO_DB6_REG 0x15E
171 #define IT66121_AVIINFO_DB7_REG 0x15F
172 #define IT66121_AVIINFO_DB8_REG 0x160
173 #define IT66121_AVIINFO_DB9_REG 0x161
174 #define IT66121_AVIINFO_DB10_REG 0x162
175 #define IT66121_AVIINFO_DB11_REG 0x163
176 #define IT66121_AVIINFO_DB12_REG 0x164
177 #define IT66121_AVIINFO_DB13_REG 0x165
178
179 #define IT66121_AVI_INFO_PKT_REG 0xCD
180 #define IT66121_AVI_INFO_PKT_ON BIT(0)
181 #define IT66121_AVI_INFO_PKT_RPT BIT(1)
182
183 #define IT66121_HDMI_MODE_REG 0xC0
184 #define IT66121_HDMI_MODE_HDMI BIT(0)
185
186 #define IT66121_SYS_STATUS_REG 0x0E
187 #define IT66121_SYS_STATUS_ACTIVE_IRQ BIT(7)
188 #define IT66121_SYS_STATUS_HPDETECT BIT(6)
189 #define IT66121_SYS_STATUS_SENDECTECT BIT(5)
190 #define IT66121_SYS_STATUS_VID_STABLE BIT(4)
191 #define IT66121_SYS_STATUS_AUD_CTS_CLR BIT(1)
192 #define IT66121_SYS_STATUS_CLEAR_IRQ BIT(0)
193
194 #define IT66121_DDC_STATUS_REG 0x16
195 #define IT66121_DDC_STATUS_TX_DONE BIT(7)
196 #define IT66121_DDC_STATUS_ACTIVE BIT(6)
197 #define IT66121_DDC_STATUS_NOACK BIT(5)
198 #define IT66121_DDC_STATUS_WAIT_BUS BIT(4)
199 #define IT66121_DDC_STATUS_ARBI_LOSE BIT(3)
200 #define IT66121_DDC_STATUS_FIFO_FULL BIT(2)
201 #define IT66121_DDC_STATUS_FIFO_EMPTY BIT(1)
202 #define IT66121_DDC_STATUS_FIFO_VALID BIT(0)
203
204 #define IT66121_EDID_SLEEP_US 20000
205 #define IT66121_EDID_TIMEOUT_US 200000
206 #define IT66121_EDID_FIFO_SIZE 32
207
208 #define IT66121_CLK_CTRL0_REG 0x58
209 #define IT66121_CLK_CTRL0_AUTO_OVER_SAMPLING BIT(4)
210 #define IT66121_CLK_CTRL0_EXT_MCLK_MASK GENMASK(3, 2)
211 #define IT66121_CLK_CTRL0_EXT_MCLK_128FS (0 << 2)
212 #define IT66121_CLK_CTRL0_EXT_MCLK_256FS BIT(2)
213 #define IT66121_CLK_CTRL0_EXT_MCLK_512FS (2 << 2)
214 #define IT66121_CLK_CTRL0_EXT_MCLK_1024FS (3 << 2)
215 #define IT66121_CLK_CTRL0_AUTO_IPCLK BIT(0)
216 #define IT66121_CLK_STATUS1_REG 0x5E
217 #define IT66121_CLK_STATUS2_REG 0x5F
218
219 #define IT66121_AUD_CTRL0_REG 0xE0
220 #define IT66121_AUD_SWL (3 << 6)
221 #define IT66121_AUD_16BIT (0 << 6)
222 #define IT66121_AUD_18BIT BIT(6)
223 #define IT66121_AUD_20BIT (2 << 6)
224 #define IT66121_AUD_24BIT (3 << 6)
225 #define IT66121_AUD_SPDIFTC BIT(5)
226 #define IT66121_AUD_SPDIF BIT(4)
227 #define IT66121_AUD_I2S (0 << 4)
228 #define IT66121_AUD_EN_I2S3 BIT(3)
229 #define IT66121_AUD_EN_I2S2 BIT(2)
230 #define IT66121_AUD_EN_I2S1 BIT(1)
231 #define IT66121_AUD_EN_I2S0 BIT(0)
232 #define IT66121_AUD_CTRL0_AUD_SEL BIT(4)
233
234 #define IT66121_AUD_CTRL1_REG 0xE1
235 #define IT66121_AUD_FIFOMAP_REG 0xE2
236 #define IT66121_AUD_CTRL3_REG 0xE3
237 #define IT66121_AUD_SRCVALID_FLAT_REG 0xE4
238 #define IT66121_AUD_FLAT_SRC0 BIT(4)
239 #define IT66121_AUD_FLAT_SRC1 BIT(5)
240 #define IT66121_AUD_FLAT_SRC2 BIT(6)
241 #define IT66121_AUD_FLAT_SRC3 BIT(7)
242 #define IT66121_AUD_HDAUDIO_REG 0xE5
243
244 #define IT66121_AUD_PKT_CTS0_REG 0x130
245 #define IT66121_AUD_PKT_CTS1_REG 0x131
246 #define IT66121_AUD_PKT_CTS2_REG 0x132
247 #define IT66121_AUD_PKT_N0_REG 0x133
248 #define IT66121_AUD_PKT_N1_REG 0x134
249 #define IT66121_AUD_PKT_N2_REG 0x135
250
251 #define IT66121_AUD_CHST_MODE_REG 0x191
252 #define IT66121_AUD_CHST_CAT_REG 0x192
253 #define IT66121_AUD_CHST_SRCNUM_REG 0x193
254 #define IT66121_AUD_CHST_CHTNUM_REG 0x194
255 #define IT66121_AUD_CHST_CA_FS_REG 0x198
256 #define IT66121_AUD_CHST_OFS_WL_REG 0x199
257
258 #define IT66121_AUD_PKT_CTS_CNT0_REG 0x1A0
259 #define IT66121_AUD_PKT_CTS_CNT1_REG 0x1A1
260 #define IT66121_AUD_PKT_CTS_CNT2_REG 0x1A2
261
262 #define IT66121_AUD_FS_22P05K 0x4
263 #define IT66121_AUD_FS_44P1K 0x0
264 #define IT66121_AUD_FS_88P2K 0x8
265 #define IT66121_AUD_FS_176P4K 0xC
266 #define IT66121_AUD_FS_24K 0x6
267 #define IT66121_AUD_FS_48K 0x2
268 #define IT66121_AUD_FS_96K 0xA
269 #define IT66121_AUD_FS_192K 0xE
270 #define IT66121_AUD_FS_768K 0x9
271 #define IT66121_AUD_FS_32K 0x3
272 #define IT66121_AUD_FS_OTHER 0x1
273
274 #define IT66121_AUD_SWL_21BIT 0xD
275 #define IT66121_AUD_SWL_24BIT 0xB
276 #define IT66121_AUD_SWL_23BIT 0x9
277 #define IT66121_AUD_SWL_22BIT 0x5
278 #define IT66121_AUD_SWL_20BIT 0x3
279 #define IT66121_AUD_SWL_17BIT 0xC
280 #define IT66121_AUD_SWL_19BIT 0x8
281 #define IT66121_AUD_SWL_18BIT 0x4
282 #define IT66121_AUD_SWL_16BIT 0x2
283 #define IT66121_AUD_SWL_NOT_INDICATED 0x0
284
285 #define IT66121_AFE_CLK_HIGH 80000 /* Khz */
286
287 enum chip_id {
288 ID_IT6610,
289 ID_IT66121,
290 };
291
292 struct it66121_chip_info {
293 enum chip_id id;
294 u16 vid, pid;
295 };
296
297 struct it66121_ctx {
298 struct regmap *regmap;
299 struct drm_bridge bridge;
300 struct drm_bridge *next_bridge;
301 struct drm_connector *connector;
302 struct device *dev;
303 struct gpio_desc *gpio_reset;
304 struct i2c_client *client;
305 u32 bus_width;
306 struct mutex lock; /* Protects fields below and device registers */
307 struct hdmi_avi_infoframe hdmi_avi_infoframe;
308 struct {
309 struct platform_device *pdev;
310 u8 ch_enable;
311 u8 fs;
312 u8 swl;
313 bool auto_cts;
314 } audio;
315 const struct it66121_chip_info *info;
316 };
317
318 static const struct regmap_range_cfg it66121_regmap_banks[] = {
319 {
320 .name = "it66121",
321 .range_min = 0x00,
322 .range_max = 0x1FF,
323 .selector_reg = IT66121_CLK_BANK_REG,
324 .selector_mask = 0x1,
325 .selector_shift = 0,
326 .window_start = 0x00,
327 .window_len = 0x100,
328 },
329 };
330
331 static const struct regmap_config it66121_regmap_config = {
332 .val_bits = 8,
333 .reg_bits = 8,
334 .max_register = 0x1FF,
335 .ranges = it66121_regmap_banks,
336 .num_ranges = ARRAY_SIZE(it66121_regmap_banks),
337 };
338
it66121_hw_reset(struct it66121_ctx * ctx)339 static void it66121_hw_reset(struct it66121_ctx *ctx)
340 {
341 gpiod_set_value(ctx->gpio_reset, 1);
342 msleep(20);
343 gpiod_set_value(ctx->gpio_reset, 0);
344 }
345
it66121_preamble_ddc(struct it66121_ctx * ctx)346 static inline int it66121_preamble_ddc(struct it66121_ctx *ctx)
347 {
348 return regmap_write(ctx->regmap, IT66121_MASTER_SEL_REG, IT66121_MASTER_SEL_HOST);
349 }
350
it66121_fire_afe(struct it66121_ctx * ctx)351 static inline int it66121_fire_afe(struct it66121_ctx *ctx)
352 {
353 return regmap_write(ctx->regmap, IT66121_AFE_DRV_REG, 0);
354 }
355
356 /* TOFIX: Handle YCbCr Input & Output */
it66121_configure_input(struct it66121_ctx * ctx)357 static int it66121_configure_input(struct it66121_ctx *ctx)
358 {
359 int ret;
360 u8 mode = IT66121_INPUT_MODE_RGB;
361
362 if (ctx->bus_width == 12)
363 mode |= IT66121_INPUT_MODE_DDR;
364
365 ret = regmap_write(ctx->regmap, IT66121_INPUT_MODE_REG, mode);
366 if (ret)
367 return ret;
368
369 return regmap_write(ctx->regmap, IT66121_INPUT_CSC_REG, IT66121_INPUT_CSC_NO_CONV);
370 }
371
372 /**
373 * it66121_configure_afe() - Configure the analog front end
374 * @ctx: it66121_ctx object
375 * @mode: mode to configure
376 *
377 * RETURNS:
378 * zero if success, a negative error code otherwise.
379 */
it66121_configure_afe(struct it66121_ctx * ctx,const struct drm_display_mode * mode)380 static int it66121_configure_afe(struct it66121_ctx *ctx,
381 const struct drm_display_mode *mode)
382 {
383 int ret;
384
385 ret = regmap_write(ctx->regmap, IT66121_AFE_DRV_REG,
386 IT66121_AFE_DRV_RST);
387 if (ret)
388 return ret;
389
390 if (mode->clock > IT66121_AFE_CLK_HIGH) {
391 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
392 IT66121_AFE_XP_GAINBIT |
393 IT66121_AFE_XP_ENO,
394 IT66121_AFE_XP_GAINBIT);
395 if (ret)
396 return ret;
397
398 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
399 IT66121_AFE_IP_GAINBIT |
400 IT66121_AFE_IP_ER0,
401 IT66121_AFE_IP_GAINBIT);
402 if (ret)
403 return ret;
404
405 if (ctx->info->id == ID_IT66121) {
406 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
407 IT66121_AFE_IP_EC1, 0);
408 if (ret)
409 return ret;
410
411 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG,
412 IT66121_AFE_XP_EC1_LOWCLK, 0x80);
413 if (ret)
414 return ret;
415 }
416 } else {
417 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
418 IT66121_AFE_XP_GAINBIT |
419 IT66121_AFE_XP_ENO,
420 IT66121_AFE_XP_ENO);
421 if (ret)
422 return ret;
423
424 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
425 IT66121_AFE_IP_GAINBIT |
426 IT66121_AFE_IP_ER0,
427 IT66121_AFE_IP_ER0);
428 if (ret)
429 return ret;
430
431 if (ctx->info->id == ID_IT66121) {
432 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
433 IT66121_AFE_IP_EC1,
434 IT66121_AFE_IP_EC1);
435 if (ret)
436 return ret;
437
438 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG,
439 IT66121_AFE_XP_EC1_LOWCLK,
440 IT66121_AFE_XP_EC1_LOWCLK);
441 if (ret)
442 return ret;
443 }
444 }
445
446 /* Clear reset flags */
447 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
448 IT66121_SW_RST_REF | IT66121_SW_RST_VID, 0);
449 if (ret)
450 return ret;
451
452 if (ctx->info->id == ID_IT6610) {
453 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
454 IT6610_AFE_XP_BYPASS,
455 IT6610_AFE_XP_BYPASS);
456 if (ret)
457 return ret;
458 }
459
460 return it66121_fire_afe(ctx);
461 }
462
it66121_wait_ddc_ready(struct it66121_ctx * ctx)463 static inline int it66121_wait_ddc_ready(struct it66121_ctx *ctx)
464 {
465 int ret, val;
466 u32 error = IT66121_DDC_STATUS_NOACK | IT66121_DDC_STATUS_WAIT_BUS |
467 IT66121_DDC_STATUS_ARBI_LOSE;
468 u32 done = IT66121_DDC_STATUS_TX_DONE;
469
470 ret = regmap_read_poll_timeout(ctx->regmap, IT66121_DDC_STATUS_REG, val,
471 val & (error | done), IT66121_EDID_SLEEP_US,
472 IT66121_EDID_TIMEOUT_US);
473 if (ret)
474 return ret;
475
476 if (val & error)
477 return -EAGAIN;
478
479 return 0;
480 }
481
it66121_abort_ddc_ops(struct it66121_ctx * ctx)482 static int it66121_abort_ddc_ops(struct it66121_ctx *ctx)
483 {
484 int ret;
485 unsigned int swreset, cpdesire;
486
487 ret = regmap_read(ctx->regmap, IT66121_SW_RST_REG, &swreset);
488 if (ret)
489 return ret;
490
491 ret = regmap_read(ctx->regmap, IT66121_HDCP_REG, &cpdesire);
492 if (ret)
493 return ret;
494
495 ret = regmap_write(ctx->regmap, IT66121_HDCP_REG,
496 cpdesire & (~IT66121_HDCP_CPDESIRED & 0xFF));
497 if (ret)
498 return ret;
499
500 ret = regmap_write(ctx->regmap, IT66121_SW_RST_REG,
501 (swreset | IT66121_SW_RST_HDCP));
502 if (ret)
503 return ret;
504
505 ret = it66121_preamble_ddc(ctx);
506 if (ret)
507 return ret;
508
509 ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
510 IT66121_DDC_COMMAND_ABORT);
511 if (ret)
512 return ret;
513
514 return it66121_wait_ddc_ready(ctx);
515 }
516
it66121_get_edid_block(void * context,u8 * buf,unsigned int block,size_t len)517 static int it66121_get_edid_block(void *context, u8 *buf,
518 unsigned int block, size_t len)
519 {
520 struct it66121_ctx *ctx = context;
521 int remain = len;
522 int offset = 0;
523 int ret, cnt;
524
525 offset = (block % 2) * len;
526 block = block / 2;
527
528 while (remain > 0) {
529 cnt = (remain > IT66121_EDID_FIFO_SIZE) ?
530 IT66121_EDID_FIFO_SIZE : remain;
531
532 ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
533 IT66121_DDC_COMMAND_FIFO_CLR);
534 if (ret)
535 return ret;
536
537 ret = it66121_wait_ddc_ready(ctx);
538 if (ret)
539 return ret;
540
541 ret = regmap_write(ctx->regmap, IT66121_DDC_OFFSET_REG, offset);
542 if (ret)
543 return ret;
544
545 ret = regmap_write(ctx->regmap, IT66121_DDC_BYTE_REG, cnt);
546 if (ret)
547 return ret;
548
549 ret = regmap_write(ctx->regmap, IT66121_DDC_SEGMENT_REG, block);
550 if (ret)
551 return ret;
552
553 ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
554 IT66121_DDC_COMMAND_EDID_READ);
555 if (ret)
556 return ret;
557
558 offset += cnt;
559 remain -= cnt;
560
561 ret = it66121_wait_ddc_ready(ctx);
562 if (ret) {
563 it66121_abort_ddc_ops(ctx);
564 return ret;
565 }
566
567 ret = regmap_noinc_read(ctx->regmap, IT66121_DDC_RD_FIFO_REG,
568 buf, cnt);
569 if (ret)
570 return ret;
571
572 buf += cnt;
573 }
574
575 return 0;
576 }
577
it66121_is_hpd_detect(struct it66121_ctx * ctx)578 static bool it66121_is_hpd_detect(struct it66121_ctx *ctx)
579 {
580 int val;
581
582 if (regmap_read(ctx->regmap, IT66121_SYS_STATUS_REG, &val))
583 return false;
584
585 return val & IT66121_SYS_STATUS_HPDETECT;
586 }
587
it66121_bridge_attach(struct drm_bridge * bridge,enum drm_bridge_attach_flags flags)588 static int it66121_bridge_attach(struct drm_bridge *bridge,
589 enum drm_bridge_attach_flags flags)
590 {
591 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
592 int ret;
593
594 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
595 return -EINVAL;
596
597 ret = drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags);
598 if (ret)
599 return ret;
600
601 if (ctx->info->id == ID_IT66121) {
602 ret = regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
603 IT66121_CLK_BANK_PWROFF_RCLK, 0);
604 if (ret)
605 return ret;
606 }
607
608 ret = regmap_write_bits(ctx->regmap, IT66121_INT_REG,
609 IT66121_INT_TX_CLK_OFF, 0);
610 if (ret)
611 return ret;
612
613 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG,
614 IT66121_AFE_DRV_PWD, 0);
615 if (ret)
616 return ret;
617
618 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
619 IT66121_AFE_XP_PWDI | IT66121_AFE_XP_PWDPLL, 0);
620 if (ret)
621 return ret;
622
623 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
624 IT66121_AFE_IP_PWDPLL, 0);
625 if (ret)
626 return ret;
627
628 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG,
629 IT66121_AFE_DRV_RST, 0);
630 if (ret)
631 return ret;
632
633 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
634 IT66121_AFE_XP_RESETB, IT66121_AFE_XP_RESETB);
635 if (ret)
636 return ret;
637
638 ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
639 IT66121_AFE_IP_RESETB, IT66121_AFE_IP_RESETB);
640 if (ret)
641 return ret;
642
643 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
644 IT66121_SW_RST_REF,
645 IT66121_SW_RST_REF);
646 if (ret)
647 return ret;
648
649 /* Per programming manual, sleep here for bridge to settle */
650 msleep(50);
651
652 return 0;
653 }
654
it66121_set_mute(struct it66121_ctx * ctx,bool mute)655 static int it66121_set_mute(struct it66121_ctx *ctx, bool mute)
656 {
657 int ret;
658 unsigned int val = 0;
659
660 if (mute)
661 val = IT66121_AV_MUTE_ON;
662
663 ret = regmap_write_bits(ctx->regmap, IT66121_AV_MUTE_REG, IT66121_AV_MUTE_ON, val);
664 if (ret)
665 return ret;
666
667 return regmap_write(ctx->regmap, IT66121_PKT_GEN_CTRL_REG,
668 IT66121_PKT_GEN_CTRL_ON | IT66121_PKT_GEN_CTRL_RPT);
669 }
670
671 #define MAX_OUTPUT_SEL_FORMATS 1
672
it66121_bridge_atomic_get_output_bus_fmts(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state,unsigned int * num_output_fmts)673 static u32 *it66121_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
674 struct drm_bridge_state *bridge_state,
675 struct drm_crtc_state *crtc_state,
676 struct drm_connector_state *conn_state,
677 unsigned int *num_output_fmts)
678 {
679 u32 *output_fmts;
680
681 output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
682 GFP_KERNEL);
683 if (!output_fmts)
684 return NULL;
685
686 /* TOFIX handle more than MEDIA_BUS_FMT_RGB888_1X24 as output format */
687 output_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
688 *num_output_fmts = 1;
689
690 return output_fmts;
691 }
692
693 #define MAX_INPUT_SEL_FORMATS 1
694
it66121_bridge_atomic_get_input_bus_fmts(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state,u32 output_fmt,unsigned int * num_input_fmts)695 static u32 *it66121_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
696 struct drm_bridge_state *bridge_state,
697 struct drm_crtc_state *crtc_state,
698 struct drm_connector_state *conn_state,
699 u32 output_fmt,
700 unsigned int *num_input_fmts)
701 {
702 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
703 u32 *input_fmts;
704
705 *num_input_fmts = 0;
706
707 input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
708 GFP_KERNEL);
709 if (!input_fmts)
710 return NULL;
711
712 if (ctx->bus_width == 12)
713 /* IT66121FN Datasheet specifies Little-Endian ordering */
714 input_fmts[0] = MEDIA_BUS_FMT_RGB888_2X12_LE;
715 else
716 /* TOFIX support more input bus formats in 24bit width */
717 input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
718 *num_input_fmts = 1;
719
720 return input_fmts;
721 }
722
it66121_bridge_enable(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state)723 static void it66121_bridge_enable(struct drm_bridge *bridge,
724 struct drm_bridge_state *bridge_state)
725 {
726 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
727 struct drm_atomic_state *state = bridge_state->base.state;
728
729 ctx->connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
730
731 it66121_set_mute(ctx, false);
732 }
733
it66121_bridge_disable(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state)734 static void it66121_bridge_disable(struct drm_bridge *bridge,
735 struct drm_bridge_state *bridge_state)
736 {
737 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
738
739 it66121_set_mute(ctx, true);
740
741 ctx->connector = NULL;
742 }
743
it66121_bridge_check(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)744 static int it66121_bridge_check(struct drm_bridge *bridge,
745 struct drm_bridge_state *bridge_state,
746 struct drm_crtc_state *crtc_state,
747 struct drm_connector_state *conn_state)
748 {
749 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
750
751 if (ctx->info->id == ID_IT6610) {
752 /* The IT6610 only supports these settings */
753 bridge_state->input_bus_cfg.flags |= DRM_BUS_FLAG_DE_HIGH |
754 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
755 bridge_state->input_bus_cfg.flags &=
756 ~DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;
757 }
758
759 return 0;
760 }
761
762 static
it66121_bridge_mode_set(struct drm_bridge * bridge,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)763 void it66121_bridge_mode_set(struct drm_bridge *bridge,
764 const struct drm_display_mode *mode,
765 const struct drm_display_mode *adjusted_mode)
766 {
767 u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
768 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
769 int ret;
770
771 mutex_lock(&ctx->lock);
772
773 hdmi_avi_infoframe_init(&ctx->hdmi_avi_infoframe);
774
775 ret = drm_hdmi_avi_infoframe_from_display_mode(&ctx->hdmi_avi_infoframe, ctx->connector,
776 adjusted_mode);
777 if (ret) {
778 DRM_ERROR("Failed to setup AVI infoframe: %d\n", ret);
779 goto unlock;
780 }
781
782 ret = hdmi_avi_infoframe_pack(&ctx->hdmi_avi_infoframe, buf, sizeof(buf));
783 if (ret < 0) {
784 DRM_ERROR("Failed to pack infoframe: %d\n", ret);
785 goto unlock;
786 }
787
788 /* Write new AVI infoframe packet */
789 ret = regmap_bulk_write(ctx->regmap, IT66121_AVIINFO_DB1_REG,
790 &buf[HDMI_INFOFRAME_HEADER_SIZE],
791 HDMI_AVI_INFOFRAME_SIZE);
792 if (ret)
793 goto unlock;
794
795 if (regmap_write(ctx->regmap, IT66121_AVIINFO_CSUM_REG, buf[3]))
796 goto unlock;
797
798 /* Enable AVI infoframe */
799 if (regmap_write(ctx->regmap, IT66121_AVI_INFO_PKT_REG,
800 IT66121_AVI_INFO_PKT_ON | IT66121_AVI_INFO_PKT_RPT))
801 goto unlock;
802
803 /* Set TX mode to HDMI */
804 if (regmap_write(ctx->regmap, IT66121_HDMI_MODE_REG, IT66121_HDMI_MODE_HDMI))
805 goto unlock;
806
807 if (ctx->info->id == ID_IT66121 &&
808 regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
809 IT66121_CLK_BANK_PWROFF_TXCLK,
810 IT66121_CLK_BANK_PWROFF_TXCLK)) {
811 goto unlock;
812 }
813
814 if (it66121_configure_input(ctx))
815 goto unlock;
816
817 if (it66121_configure_afe(ctx, adjusted_mode))
818 goto unlock;
819
820 if (ctx->info->id == ID_IT66121 &&
821 regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
822 IT66121_CLK_BANK_PWROFF_TXCLK, 0)) {
823 goto unlock;
824 }
825
826 unlock:
827 mutex_unlock(&ctx->lock);
828 }
829
it66121_bridge_mode_valid(struct drm_bridge * bridge,const struct drm_display_info * info,const struct drm_display_mode * mode)830 static enum drm_mode_status it66121_bridge_mode_valid(struct drm_bridge *bridge,
831 const struct drm_display_info *info,
832 const struct drm_display_mode *mode)
833 {
834 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
835 unsigned long max_clock;
836
837 max_clock = (ctx->bus_width == 12) ? 74250 : 148500;
838
839 if (mode->clock > max_clock)
840 return MODE_CLOCK_HIGH;
841
842 if (mode->clock < 25000)
843 return MODE_CLOCK_LOW;
844
845 return MODE_OK;
846 }
847
it66121_bridge_detect(struct drm_bridge * bridge)848 static enum drm_connector_status it66121_bridge_detect(struct drm_bridge *bridge)
849 {
850 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
851
852 return it66121_is_hpd_detect(ctx) ? connector_status_connected
853 : connector_status_disconnected;
854 }
855
it66121_bridge_hpd_enable(struct drm_bridge * bridge)856 static void it66121_bridge_hpd_enable(struct drm_bridge *bridge)
857 {
858 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
859 int ret;
860
861 ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG, IT66121_INT_MASK1_HPD, 0);
862 if (ret)
863 dev_err(ctx->dev, "failed to enable HPD IRQ\n");
864 }
865
it66121_bridge_hpd_disable(struct drm_bridge * bridge)866 static void it66121_bridge_hpd_disable(struct drm_bridge *bridge)
867 {
868 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
869 int ret;
870
871 ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
872 IT66121_INT_MASK1_HPD, IT66121_INT_MASK1_HPD);
873 if (ret)
874 dev_err(ctx->dev, "failed to disable HPD IRQ\n");
875 }
876
it66121_bridge_get_edid(struct drm_bridge * bridge,struct drm_connector * connector)877 static struct edid *it66121_bridge_get_edid(struct drm_bridge *bridge,
878 struct drm_connector *connector)
879 {
880 struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
881 struct edid *edid;
882 int ret;
883
884 mutex_lock(&ctx->lock);
885 ret = it66121_preamble_ddc(ctx);
886 if (ret) {
887 edid = ERR_PTR(ret);
888 goto out_unlock;
889 }
890
891 ret = regmap_write(ctx->regmap, IT66121_DDC_HEADER_REG,
892 IT66121_DDC_HEADER_EDID);
893 if (ret) {
894 edid = ERR_PTR(ret);
895 goto out_unlock;
896 }
897
898 edid = drm_do_get_edid(connector, it66121_get_edid_block, ctx);
899
900 out_unlock:
901 mutex_unlock(&ctx->lock);
902
903 return edid;
904 }
905
906 static const struct drm_bridge_funcs it66121_bridge_funcs = {
907 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
908 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
909 .atomic_reset = drm_atomic_helper_bridge_reset,
910 .attach = it66121_bridge_attach,
911 .atomic_get_output_bus_fmts = it66121_bridge_atomic_get_output_bus_fmts,
912 .atomic_get_input_bus_fmts = it66121_bridge_atomic_get_input_bus_fmts,
913 .atomic_enable = it66121_bridge_enable,
914 .atomic_disable = it66121_bridge_disable,
915 .atomic_check = it66121_bridge_check,
916 .mode_set = it66121_bridge_mode_set,
917 .mode_valid = it66121_bridge_mode_valid,
918 .detect = it66121_bridge_detect,
919 .get_edid = it66121_bridge_get_edid,
920 .hpd_enable = it66121_bridge_hpd_enable,
921 .hpd_disable = it66121_bridge_hpd_disable,
922 };
923
it66121_irq_threaded_handler(int irq,void * dev_id)924 static irqreturn_t it66121_irq_threaded_handler(int irq, void *dev_id)
925 {
926 int ret;
927 unsigned int val;
928 struct it66121_ctx *ctx = dev_id;
929 struct device *dev = ctx->dev;
930 enum drm_connector_status status;
931 bool event = false;
932
933 mutex_lock(&ctx->lock);
934
935 ret = regmap_read(ctx->regmap, IT66121_SYS_STATUS_REG, &val);
936 if (ret)
937 goto unlock;
938
939 if (!(val & IT66121_SYS_STATUS_ACTIVE_IRQ))
940 goto unlock;
941
942 ret = regmap_read(ctx->regmap, IT66121_INT_STATUS1_REG, &val);
943 if (ret) {
944 dev_err(dev, "Cannot read STATUS1_REG %d\n", ret);
945 } else if (val & IT66121_INT_STATUS1_HPD_STATUS) {
946 regmap_write_bits(ctx->regmap, IT66121_INT_CLR1_REG,
947 IT66121_INT_CLR1_HPD, IT66121_INT_CLR1_HPD);
948
949 status = it66121_is_hpd_detect(ctx) ? connector_status_connected
950 : connector_status_disconnected;
951
952 event = true;
953 }
954
955 regmap_write_bits(ctx->regmap, IT66121_SYS_STATUS_REG,
956 IT66121_SYS_STATUS_CLEAR_IRQ,
957 IT66121_SYS_STATUS_CLEAR_IRQ);
958
959 unlock:
960 mutex_unlock(&ctx->lock);
961
962 if (event)
963 drm_bridge_hpd_notify(&ctx->bridge, status);
964
965 return IRQ_HANDLED;
966 }
967
it661221_set_chstat(struct it66121_ctx * ctx,u8 iec60958_chstat[])968 static int it661221_set_chstat(struct it66121_ctx *ctx, u8 iec60958_chstat[])
969 {
970 int ret;
971
972 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_MODE_REG, iec60958_chstat[0] & 0x7C);
973 if (ret)
974 return ret;
975
976 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CAT_REG, iec60958_chstat[1]);
977 if (ret)
978 return ret;
979
980 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_SRCNUM_REG, iec60958_chstat[2] & 0x0F);
981 if (ret)
982 return ret;
983
984 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CHTNUM_REG,
985 (iec60958_chstat[2] >> 4) & 0x0F);
986 if (ret)
987 return ret;
988
989 ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CA_FS_REG, iec60958_chstat[3]);
990 if (ret)
991 return ret;
992
993 return regmap_write(ctx->regmap, IT66121_AUD_CHST_OFS_WL_REG, iec60958_chstat[4]);
994 }
995
it661221_set_lpcm_audio(struct it66121_ctx * ctx,u8 audio_src_num,u8 audio_swl)996 static int it661221_set_lpcm_audio(struct it66121_ctx *ctx, u8 audio_src_num, u8 audio_swl)
997 {
998 int ret;
999 unsigned int audio_enable = 0;
1000 unsigned int audio_format = 0;
1001
1002 switch (audio_swl) {
1003 case 16:
1004 audio_enable |= IT66121_AUD_16BIT;
1005 break;
1006 case 18:
1007 audio_enable |= IT66121_AUD_18BIT;
1008 break;
1009 case 20:
1010 audio_enable |= IT66121_AUD_20BIT;
1011 break;
1012 case 24:
1013 default:
1014 audio_enable |= IT66121_AUD_24BIT;
1015 break;
1016 }
1017
1018 audio_format |= 0x40;
1019 switch (audio_src_num) {
1020 case 4:
1021 audio_enable |= IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
1022 IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0;
1023 break;
1024 case 3:
1025 audio_enable |= IT66121_AUD_EN_I2S2 | IT66121_AUD_EN_I2S1 |
1026 IT66121_AUD_EN_I2S0;
1027 break;
1028 case 2:
1029 audio_enable |= IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0;
1030 break;
1031 case 1:
1032 default:
1033 audio_format &= ~0x40;
1034 audio_enable |= IT66121_AUD_EN_I2S0;
1035 break;
1036 }
1037
1038 audio_format |= 0x01;
1039 ctx->audio.ch_enable = audio_enable;
1040
1041 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, audio_enable & 0xF0);
1042 if (ret)
1043 return ret;
1044
1045 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL1_REG, audio_format);
1046 if (ret)
1047 return ret;
1048
1049 ret = regmap_write(ctx->regmap, IT66121_AUD_FIFOMAP_REG, 0xE4);
1050 if (ret)
1051 return ret;
1052
1053 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL3_REG, 0x00);
1054 if (ret)
1055 return ret;
1056
1057 ret = regmap_write(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG, 0x00);
1058 if (ret)
1059 return ret;
1060
1061 return regmap_write(ctx->regmap, IT66121_AUD_HDAUDIO_REG, 0x00);
1062 }
1063
it661221_set_ncts(struct it66121_ctx * ctx,u8 fs)1064 static int it661221_set_ncts(struct it66121_ctx *ctx, u8 fs)
1065 {
1066 int ret;
1067 unsigned int n;
1068
1069 switch (fs) {
1070 case IT66121_AUD_FS_32K:
1071 n = 4096;
1072 break;
1073 case IT66121_AUD_FS_44P1K:
1074 n = 6272;
1075 break;
1076 case IT66121_AUD_FS_48K:
1077 n = 6144;
1078 break;
1079 case IT66121_AUD_FS_88P2K:
1080 n = 12544;
1081 break;
1082 case IT66121_AUD_FS_96K:
1083 n = 12288;
1084 break;
1085 case IT66121_AUD_FS_176P4K:
1086 n = 25088;
1087 break;
1088 case IT66121_AUD_FS_192K:
1089 n = 24576;
1090 break;
1091 case IT66121_AUD_FS_768K:
1092 n = 24576;
1093 break;
1094 default:
1095 n = 6144;
1096 break;
1097 }
1098
1099 ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N0_REG, (u8)((n) & 0xFF));
1100 if (ret)
1101 return ret;
1102
1103 ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N1_REG, (u8)((n >> 8) & 0xFF));
1104 if (ret)
1105 return ret;
1106
1107 ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N2_REG, (u8)((n >> 16) & 0xF));
1108 if (ret)
1109 return ret;
1110
1111 if (ctx->audio.auto_cts) {
1112 u8 loop_cnt = 255;
1113 u8 cts_stable_cnt = 0;
1114 unsigned int sum_cts = 0;
1115 unsigned int cts = 0;
1116 unsigned int last_cts = 0;
1117 unsigned int diff;
1118 unsigned int val;
1119
1120 while (loop_cnt--) {
1121 msleep(30);
1122 regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT2_REG, &val);
1123 cts = val << 12;
1124 regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT1_REG, &val);
1125 cts |= val << 4;
1126 regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT0_REG, &val);
1127 cts |= val >> 4;
1128 if (cts == 0) {
1129 continue;
1130 } else {
1131 if (last_cts > cts)
1132 diff = last_cts - cts;
1133 else
1134 diff = cts - last_cts;
1135 last_cts = cts;
1136 if (diff < 5) {
1137 cts_stable_cnt++;
1138 sum_cts += cts;
1139 } else {
1140 cts_stable_cnt = 0;
1141 sum_cts = 0;
1142 continue;
1143 }
1144
1145 if (cts_stable_cnt >= 32) {
1146 last_cts = (sum_cts >> 5);
1147 break;
1148 }
1149 }
1150 }
1151
1152 regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS0_REG, (u8)((last_cts) & 0xFF));
1153 regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS1_REG, (u8)((last_cts >> 8) & 0xFF));
1154 regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS2_REG, (u8)((last_cts >> 16) & 0x0F));
1155 }
1156
1157 ret = regmap_write(ctx->regmap, 0xF8, 0xC3);
1158 if (ret)
1159 return ret;
1160
1161 ret = regmap_write(ctx->regmap, 0xF8, 0xA5);
1162 if (ret)
1163 return ret;
1164
1165 if (ctx->audio.auto_cts) {
1166 ret = regmap_write_bits(ctx->regmap, IT66121_PKT_CTS_CTRL_REG,
1167 IT66121_PKT_CTS_CTRL_SEL,
1168 1);
1169 } else {
1170 ret = regmap_write_bits(ctx->regmap, IT66121_PKT_CTS_CTRL_REG,
1171 IT66121_PKT_CTS_CTRL_SEL,
1172 0);
1173 }
1174
1175 if (ret)
1176 return ret;
1177
1178 return regmap_write(ctx->regmap, 0xF8, 0xFF);
1179 }
1180
it661221_audio_output_enable(struct it66121_ctx * ctx,bool enable)1181 static int it661221_audio_output_enable(struct it66121_ctx *ctx, bool enable)
1182 {
1183 int ret;
1184
1185 if (enable) {
1186 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
1187 IT66121_SW_RST_AUD | IT66121_SW_RST_AREF,
1188 0);
1189 if (ret)
1190 return ret;
1191
1192 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
1193 IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
1194 IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0,
1195 ctx->audio.ch_enable);
1196 } else {
1197 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
1198 IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
1199 IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0,
1200 ctx->audio.ch_enable & 0xF0);
1201 if (ret)
1202 return ret;
1203
1204 ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
1205 IT66121_SW_RST_AUD | IT66121_SW_RST_AREF,
1206 IT66121_SW_RST_AUD | IT66121_SW_RST_AREF);
1207 }
1208
1209 return ret;
1210 }
1211
it661221_audio_ch_enable(struct it66121_ctx * ctx,bool enable)1212 static int it661221_audio_ch_enable(struct it66121_ctx *ctx, bool enable)
1213 {
1214 int ret;
1215
1216 if (enable) {
1217 ret = regmap_write(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG, 0);
1218 if (ret)
1219 return ret;
1220
1221 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, ctx->audio.ch_enable);
1222 } else {
1223 ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, ctx->audio.ch_enable & 0xF0);
1224 }
1225
1226 return ret;
1227 }
1228
it66121_audio_hw_params(struct device * dev,void * data,struct hdmi_codec_daifmt * daifmt,struct hdmi_codec_params * params)1229 static int it66121_audio_hw_params(struct device *dev, void *data,
1230 struct hdmi_codec_daifmt *daifmt,
1231 struct hdmi_codec_params *params)
1232 {
1233 u8 fs;
1234 u8 swl;
1235 int ret;
1236 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1237 static u8 iec60958_chstat[5];
1238 unsigned int channels = params->channels;
1239 unsigned int sample_rate = params->sample_rate;
1240 unsigned int sample_width = params->sample_width;
1241
1242 mutex_lock(&ctx->lock);
1243 dev_dbg(dev, "%s: %u, %u, %u, %u\n", __func__,
1244 daifmt->fmt, sample_rate, sample_width, channels);
1245
1246 switch (daifmt->fmt) {
1247 case HDMI_I2S:
1248 dev_dbg(dev, "Using HDMI I2S\n");
1249 break;
1250 default:
1251 dev_err(dev, "Invalid or unsupported DAI format %d\n", daifmt->fmt);
1252 ret = -EINVAL;
1253 goto out;
1254 }
1255
1256 // Set audio clock recovery (N/CTS)
1257 ret = regmap_write(ctx->regmap, IT66121_CLK_CTRL0_REG,
1258 IT66121_CLK_CTRL0_AUTO_OVER_SAMPLING |
1259 IT66121_CLK_CTRL0_EXT_MCLK_256FS |
1260 IT66121_CLK_CTRL0_AUTO_IPCLK);
1261 if (ret)
1262 goto out;
1263
1264 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
1265 IT66121_AUD_CTRL0_AUD_SEL, 0); // remove spdif selection
1266 if (ret)
1267 goto out;
1268
1269 switch (sample_rate) {
1270 case 44100L:
1271 fs = IT66121_AUD_FS_44P1K;
1272 break;
1273 case 88200L:
1274 fs = IT66121_AUD_FS_88P2K;
1275 break;
1276 case 176400L:
1277 fs = IT66121_AUD_FS_176P4K;
1278 break;
1279 case 32000L:
1280 fs = IT66121_AUD_FS_32K;
1281 break;
1282 case 48000L:
1283 fs = IT66121_AUD_FS_48K;
1284 break;
1285 case 96000L:
1286 fs = IT66121_AUD_FS_96K;
1287 break;
1288 case 192000L:
1289 fs = IT66121_AUD_FS_192K;
1290 break;
1291 case 768000L:
1292 fs = IT66121_AUD_FS_768K;
1293 break;
1294 default:
1295 fs = IT66121_AUD_FS_48K;
1296 break;
1297 }
1298
1299 ctx->audio.fs = fs;
1300 ret = it661221_set_ncts(ctx, fs);
1301 if (ret) {
1302 dev_err(dev, "Failed to set N/CTS: %d\n", ret);
1303 goto out;
1304 }
1305
1306 // Set audio format register (except audio channel enable)
1307 ret = it661221_set_lpcm_audio(ctx, (channels + 1) / 2, sample_width);
1308 if (ret) {
1309 dev_err(dev, "Failed to set LPCM audio: %d\n", ret);
1310 goto out;
1311 }
1312
1313 // Set audio channel status
1314 iec60958_chstat[0] = 0;
1315 if ((channels + 1) / 2 == 1)
1316 iec60958_chstat[0] |= 0x1;
1317 iec60958_chstat[0] &= ~(1 << 1);
1318 iec60958_chstat[1] = 0;
1319 iec60958_chstat[2] = (channels + 1) / 2;
1320 iec60958_chstat[2] |= (channels << 4) & 0xF0;
1321 iec60958_chstat[3] = fs;
1322
1323 switch (sample_width) {
1324 case 21L:
1325 swl = IT66121_AUD_SWL_21BIT;
1326 break;
1327 case 24L:
1328 swl = IT66121_AUD_SWL_24BIT;
1329 break;
1330 case 23L:
1331 swl = IT66121_AUD_SWL_23BIT;
1332 break;
1333 case 22L:
1334 swl = IT66121_AUD_SWL_22BIT;
1335 break;
1336 case 20L:
1337 swl = IT66121_AUD_SWL_20BIT;
1338 break;
1339 case 17L:
1340 swl = IT66121_AUD_SWL_17BIT;
1341 break;
1342 case 19L:
1343 swl = IT66121_AUD_SWL_19BIT;
1344 break;
1345 case 18L:
1346 swl = IT66121_AUD_SWL_18BIT;
1347 break;
1348 case 16L:
1349 swl = IT66121_AUD_SWL_16BIT;
1350 break;
1351 default:
1352 swl = IT66121_AUD_SWL_NOT_INDICATED;
1353 break;
1354 }
1355
1356 iec60958_chstat[4] = (((~fs) << 4) & 0xF0) | swl;
1357 ret = it661221_set_chstat(ctx, iec60958_chstat);
1358 if (ret) {
1359 dev_err(dev, "Failed to set channel status: %d\n", ret);
1360 goto out;
1361 }
1362
1363 // Enable audio channel enable while input clock stable (if SPDIF).
1364 ret = it661221_audio_ch_enable(ctx, true);
1365 if (ret) {
1366 dev_err(dev, "Failed to enable audio channel: %d\n", ret);
1367 goto out;
1368 }
1369
1370 ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
1371 IT66121_INT_MASK1_AUD_OVF,
1372 0);
1373 if (ret)
1374 goto out;
1375
1376 dev_dbg(dev, "HDMI audio enabled.\n");
1377 out:
1378 mutex_unlock(&ctx->lock);
1379
1380 return ret;
1381 }
1382
it66121_audio_startup(struct device * dev,void * data)1383 static int it66121_audio_startup(struct device *dev, void *data)
1384 {
1385 int ret;
1386 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1387
1388 dev_dbg(dev, "%s\n", __func__);
1389
1390 mutex_lock(&ctx->lock);
1391 ret = it661221_audio_output_enable(ctx, true);
1392 if (ret)
1393 dev_err(dev, "Failed to enable audio output: %d\n", ret);
1394
1395 mutex_unlock(&ctx->lock);
1396
1397 return ret;
1398 }
1399
it66121_audio_shutdown(struct device * dev,void * data)1400 static void it66121_audio_shutdown(struct device *dev, void *data)
1401 {
1402 int ret;
1403 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1404
1405 dev_dbg(dev, "%s\n", __func__);
1406
1407 mutex_lock(&ctx->lock);
1408 ret = it661221_audio_output_enable(ctx, false);
1409 if (ret)
1410 dev_err(dev, "Failed to disable audio output: %d\n", ret);
1411
1412 mutex_unlock(&ctx->lock);
1413 }
1414
it66121_audio_mute(struct device * dev,void * data,bool enable,int direction)1415 static int it66121_audio_mute(struct device *dev, void *data,
1416 bool enable, int direction)
1417 {
1418 int ret;
1419 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1420
1421 dev_dbg(dev, "%s: enable=%s, direction=%d\n",
1422 __func__, enable ? "true" : "false", direction);
1423
1424 mutex_lock(&ctx->lock);
1425
1426 if (enable) {
1427 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG,
1428 IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
1429 IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3,
1430 IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
1431 IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3);
1432 } else {
1433 ret = regmap_write_bits(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG,
1434 IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
1435 IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3,
1436 0);
1437 }
1438
1439 mutex_unlock(&ctx->lock);
1440
1441 return ret;
1442 }
1443
it66121_audio_get_eld(struct device * dev,void * data,u8 * buf,size_t len)1444 static int it66121_audio_get_eld(struct device *dev, void *data,
1445 u8 *buf, size_t len)
1446 {
1447 struct it66121_ctx *ctx = dev_get_drvdata(dev);
1448
1449 mutex_lock(&ctx->lock);
1450
1451 memcpy(buf, ctx->connector->eld,
1452 min(sizeof(ctx->connector->eld), len));
1453
1454 mutex_unlock(&ctx->lock);
1455
1456 return 0;
1457 }
1458
1459 static const struct hdmi_codec_ops it66121_audio_codec_ops = {
1460 .hw_params = it66121_audio_hw_params,
1461 .audio_startup = it66121_audio_startup,
1462 .audio_shutdown = it66121_audio_shutdown,
1463 .mute_stream = it66121_audio_mute,
1464 .get_eld = it66121_audio_get_eld,
1465 .no_capture_mute = 1,
1466 };
1467
it66121_audio_codec_init(struct it66121_ctx * ctx,struct device * dev)1468 static int it66121_audio_codec_init(struct it66121_ctx *ctx, struct device *dev)
1469 {
1470 struct hdmi_codec_pdata codec_data = {
1471 .ops = &it66121_audio_codec_ops,
1472 .i2s = 1, /* Only i2s support for now */
1473 .spdif = 0,
1474 .max_i2s_channels = 8,
1475 };
1476
1477 dev_dbg(dev, "%s\n", __func__);
1478
1479 if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
1480 dev_info(dev, "No \"#sound-dai-cells\", no audio\n");
1481 return 0;
1482 }
1483
1484 ctx->audio.pdev = platform_device_register_data(dev,
1485 HDMI_CODEC_DRV_NAME,
1486 PLATFORM_DEVID_AUTO,
1487 &codec_data,
1488 sizeof(codec_data));
1489
1490 if (IS_ERR(ctx->audio.pdev)) {
1491 dev_err(dev, "Failed to initialize HDMI audio codec: %d\n",
1492 PTR_ERR_OR_ZERO(ctx->audio.pdev));
1493 }
1494
1495 return PTR_ERR_OR_ZERO(ctx->audio.pdev);
1496 }
1497
1498 static const char * const it66121_supplies[] = {
1499 "vcn33", "vcn18", "vrf12"
1500 };
1501
it66121_probe(struct i2c_client * client)1502 static int it66121_probe(struct i2c_client *client)
1503 {
1504 const struct i2c_device_id *id = i2c_client_get_device_id(client);
1505 u32 revision_id, vendor_ids[2] = { 0 }, device_ids[2] = { 0 };
1506 struct device_node *ep;
1507 int ret;
1508 struct it66121_ctx *ctx;
1509 struct device *dev = &client->dev;
1510
1511 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1512 dev_err(dev, "I2C check functionality failed.\n");
1513 return -ENXIO;
1514 }
1515
1516 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1517 if (!ctx)
1518 return -ENOMEM;
1519
1520 ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
1521 if (!ep)
1522 return -EINVAL;
1523
1524 ctx->dev = dev;
1525 ctx->client = client;
1526 ctx->info = (const struct it66121_chip_info *) id->driver_data;
1527
1528 of_property_read_u32(ep, "bus-width", &ctx->bus_width);
1529 of_node_put(ep);
1530
1531 if (ctx->bus_width != 12 && ctx->bus_width != 24)
1532 return -EINVAL;
1533
1534 ep = of_graph_get_remote_node(dev->of_node, 1, -1);
1535 if (!ep) {
1536 dev_err(ctx->dev, "The endpoint is unconnected\n");
1537 return -EINVAL;
1538 }
1539
1540 if (!of_device_is_available(ep)) {
1541 of_node_put(ep);
1542 dev_err(ctx->dev, "The remote device is disabled\n");
1543 return -ENODEV;
1544 }
1545
1546 ctx->next_bridge = of_drm_find_bridge(ep);
1547 of_node_put(ep);
1548 if (!ctx->next_bridge) {
1549 dev_dbg(ctx->dev, "Next bridge not found, deferring probe\n");
1550 return -EPROBE_DEFER;
1551 }
1552
1553 i2c_set_clientdata(client, ctx);
1554 mutex_init(&ctx->lock);
1555
1556 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(it66121_supplies),
1557 it66121_supplies);
1558 if (ret) {
1559 dev_err(dev, "Failed to enable power supplies\n");
1560 return ret;
1561 }
1562
1563 it66121_hw_reset(ctx);
1564
1565 ctx->regmap = devm_regmap_init_i2c(client, &it66121_regmap_config);
1566 if (IS_ERR(ctx->regmap))
1567 return PTR_ERR(ctx->regmap);
1568
1569 regmap_read(ctx->regmap, IT66121_VENDOR_ID0_REG, &vendor_ids[0]);
1570 regmap_read(ctx->regmap, IT66121_VENDOR_ID1_REG, &vendor_ids[1]);
1571 regmap_read(ctx->regmap, IT66121_DEVICE_ID0_REG, &device_ids[0]);
1572 regmap_read(ctx->regmap, IT66121_DEVICE_ID1_REG, &device_ids[1]);
1573
1574 /* Revision is shared with DEVICE_ID1 */
1575 revision_id = FIELD_GET(IT66121_REVISION_MASK, device_ids[1]);
1576 device_ids[1] &= IT66121_DEVICE_ID1_MASK;
1577
1578 if ((vendor_ids[1] << 8 | vendor_ids[0]) != ctx->info->vid ||
1579 (device_ids[1] << 8 | device_ids[0]) != ctx->info->pid) {
1580 return -ENODEV;
1581 }
1582
1583 ctx->bridge.funcs = &it66121_bridge_funcs;
1584 ctx->bridge.of_node = dev->of_node;
1585 ctx->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1586 ctx->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
1587
1588 ret = devm_request_threaded_irq(dev, client->irq, NULL, it66121_irq_threaded_handler,
1589 IRQF_ONESHOT, dev_name(dev), ctx);
1590 if (ret < 0) {
1591 dev_err(dev, "Failed to request irq %d:%d\n", client->irq, ret);
1592 return ret;
1593 }
1594
1595 it66121_audio_codec_init(ctx, dev);
1596
1597 drm_bridge_add(&ctx->bridge);
1598
1599 dev_info(ctx->dev, "IT66121 revision %d probed\n", revision_id);
1600
1601 return 0;
1602 }
1603
it66121_remove(struct i2c_client * client)1604 static void it66121_remove(struct i2c_client *client)
1605 {
1606 struct it66121_ctx *ctx = i2c_get_clientdata(client);
1607
1608 drm_bridge_remove(&ctx->bridge);
1609 mutex_destroy(&ctx->lock);
1610 }
1611
1612 static const struct of_device_id it66121_dt_match[] = {
1613 { .compatible = "ite,it66121" },
1614 { .compatible = "ite,it6610" },
1615 { }
1616 };
1617 MODULE_DEVICE_TABLE(of, it66121_dt_match);
1618
1619 static const struct it66121_chip_info it66121_chip_info = {
1620 .id = ID_IT66121,
1621 .vid = 0x4954,
1622 .pid = 0x0612,
1623 };
1624
1625 static const struct it66121_chip_info it6610_chip_info = {
1626 .id = ID_IT6610,
1627 .vid = 0xca00,
1628 .pid = 0x0611,
1629 };
1630
1631 static const struct i2c_device_id it66121_id[] = {
1632 { "it66121", (kernel_ulong_t) &it66121_chip_info },
1633 { "it6610", (kernel_ulong_t) &it6610_chip_info },
1634 { }
1635 };
1636 MODULE_DEVICE_TABLE(i2c, it66121_id);
1637
1638 static struct i2c_driver it66121_driver = {
1639 .driver = {
1640 .name = "it66121",
1641 .of_match_table = it66121_dt_match,
1642 },
1643 .probe = it66121_probe,
1644 .remove = it66121_remove,
1645 .id_table = it66121_id,
1646 };
1647
1648 module_i2c_driver(it66121_driver);
1649
1650 MODULE_AUTHOR("Phong LE");
1651 MODULE_DESCRIPTION("IT66121 HDMI transmitter driver");
1652 MODULE_LICENSE("GPL v2");
1653
